1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/error-codes/E0719.rs b/src/test/ui/error-codes/E0719.rs
new file mode 100644
index 00000000000..c7bfa85093f
--- /dev/null
+++ b/src/test/ui/error-codes/E0719.rs
@@ -0,0 +1,22 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+trait Foo: Iterator<Item = i32, Item = i32> {}
+
+type Unit = ();
+
+fn test() -> Box<Iterator<Item = (), Item = Unit>> {
+    Box::new(None.into_iter())
+}
+
+fn main() {
+    let _: &Iterator<Item = i32, Item = i32>;
+    test();
+}